Magnonics Crystal Composed by Magnetic Antivortices Confined in Antidots

Author

Ragusa, Carlo ; Carpentieri, Michele ; Celegato, Federica ; Tiberto, Paola ; Enrico, E. ; Boarino, Luca ; Finocchio, Giovanni

Author_Institution

Dept. of Ing. Elettr., Politec. of Torino, Torino, Italy

Volume

47

Issue

10

fYear

2011

Firstpage

2498

Lastpage

2501

Abstract

A magnetic patterned system constituted by antidots has been synthesized by electron beam lithography and its static and dynamical properties have been studied. Magnetic-domain patterns related to the static hysteresis loop have been acquired by means of magnetic force microscopy. The dynamical response to a magnetic field pulse has been studied by means of micromagnetic simulations. We found the magnetic response of a single antidot (excitation of a single mode) is qualitatively different from the one of coupled antidots (excitation of two modes). In the latter configuration, micromagnetic simulations show the low-frequency mode related to the in-phase oscillation of the magnetization and the high-frequency mode related to the out-of-phase oscillation of the magnetization.

Keywords

electron beam lithography; iron alloys; magnetic domains; magnetic force microscopy; magnetic hysteresis; magnetisation; magnons; metallic thin films; nickel alloys; oscillations; quantum dots; vortices; Ni₈₀Fe₂₀; antidots; electron beam lithography; high-frequency mode; in-phase oscillation; low-frequency mode; magnetic antivortex; magnetic field pulse; magnetic force microscopy; magnetic patterned system; magnetic response; magnetic-domain patterns; magnetization; magnonics crystal; micromagnetic simulations; out-of-phase oscillation; static hysteresis loop; Crystals; Magnetic cores; Magnetic hysteresis; Magnetic resonance imaging; Magnetization; Magnetoacoustic effects; Micromagnetics; Magnetic films; magnetic force microscopy; magnonics crystal; micromagnetics;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2158578

Filename

6027826